Standard field tables and trigonometric formulas. 

 - 6th ed. 
 - Washington :  Government printing office,  1942. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometría
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>514(083.3)